ReGen YT

[5030]

The DPF cannister is NEVER clean. The soot is burned off and the ash drops to the bottom of the cannister. It's always there just waiting for the ECM to sense it's full and derate the motor until you have it cleaned or renewed.

 

[DavidL61]

David, To me it sounds like you are not running the engine hard enough, in todays emmissions you need to run above 2500 to keep the soot filters clean. Techs at most shops will tell you they are designed to run higher RPM`s, most Techs say run it like you stole it!

the issue is the YT is not reporting data back accurately. They say the average rpms is 1550 and I know I always run it 2200 rpm or higher.

Since I got it back from the dealer 7/3, I've been running it at 2200 rpm or more and it still did a regen after 13.5 hours.

Like you said, Yanmar just recommended I run it at 2500 rpm and see what happens.

 

[ptsg]

What kind of work are you doing? Is enough to get some decent load on the engine?

 

[DavidL61]

What kind of work are you doing? Is enough to get some decent load on the engine?

backhoe trench digging and grading a quite a bit of dirt with a box blade and bucket.

 

[Williy]

My YT235C did a regen at 32.8 but I let is idle for awhile
believe that is why it did a regen so soon. using red fuel
but only have 10 gallons left then back to trucker fuel

willy

 

[DavidL61]

Ran my YT347 at 2500 rpm and above as Yanmar suggested. It regenerated again at 12.5 hours. I will be calling Yanmar tomorrow.

 

[Andy64]

I'm still dealing with Yanmar with my re-gen issue. They say I'm not running it hard enough; I say BS. I'm run it at a minimum of 2200 rpm. It's been at the dealers twice and I'm also in contact with a Yanmar tech.

My tractor re-gens are averaging every 11 hours.

For those of you that have YT's, what is the average RPM you're running your tractor and if you haven't stated in relies, how many re-gens have you gone through?

I purchased a YT359C in April of this year. For the first two weeks I did nothing but move piles of dirt from daylight until dark. I used the a-b buttons to go from 2200 rpms while hauling to 2400+ while pushing into the piles. My first regen was at 96 hrs and my second was at 173 hrs. The tractor is now at 228 hrs. I have moved logs with a grapple, dirt & gravel with the bucket, brush hogged and mowed with a finish mower. I rarely if ever use the tractor below 2100-2200 rpm. If you are still having issues just for kicks, try running the tractor at full throttle for a few weeks and see if that helps!
Andy

 

[DavidL61]

I purchased a YT359C in April of this year. For the first two weeks I did nothing but move piles of dirt from daylight until dark. I used the a-b buttons to go from 2200 rpms while hauling to 2400+ while pushing into the piles. My first regen was at 96 hrs and my second was at 173 hrs. The tractor is now at 228 hrs. I have moved logs with a grapple, dirt & gravel with the bucket, brush hogged and mowed with a finish mower. I rarely if ever use the tractor below 2100-2200 rpm. If you are still having issues just for kicks, try running the tractor at full throttle for a few weeks and see if that helps!
Andy

Andy, Thanks for the suggestions. Sounds like I’m operating my tractor about the same as yours. I’ve gone through all that, running at a constant 2400 rpm while using the backhoe, at the suggestion of Yanmar. Im always running it above 2200 rpm. The last 3 times it Regend was after 6 hours. Yanmar sent me a data logger to monitor the tractor and sent it back after 3 Regens , but the data wasn’t good. I have 320 hours on it and lost track of the number of regens.

Yanmar is sending out one of their engineers next Thursday to look at the tractor and take fluid samples.

Hope they figure it out.

 

[Williy]

YT235C regen was about every 30 hours 2 times
so far but that was probably because of too much
idle time so running at 2200 rpm now we'll see what
happens

willy

 

[cabover4us]

I feel sick because I don't do what you guys do, I run my Yt235 like my John Deere 855. Only run my rpms high when using the pto. Example, few days ago filed pot holes on our road tractor idled for 2 or 3 hours I then started shutting it off. Next day finished with few more buckets and then regen lite came on. So it's out there now at 2000 rpms to clean filter out.
Let me go check it now. 13:00 rite now running 45 minutes. An Easter Cleansing, yes all set and cleaned out. I can't tell you when it was finished so could be half hour or so. The longest regen was almost an hour earlier when it was new. Now all this time has passed I do like this tractor but I realize now I should have bought higher up like the 359 without the cab TLB version. On the jobs we've done so far it's been OK but moving logs around picking up fence sections it wouldn't budge. So one log at a time 8 inch diameter 20 foot just barely lifted. Of course at retirement age I think this is the one that will bury me here. Woulda shoulda coulda...

 

[freightboy]

Idling will cause more frequent regens. Also, when the regen light comes on and blinks every 2 seconds you should press it until it starts and continue working. If it is blinking every second with a yellow lamp and diagnostic trouble code of 00 00E87.16, you should do a stationary or parked regeneration. This is done when the tractor is at operating temperature, park brake set, range select in neutral and pedals released. Then press and hold the initiate regen button until it starts. It should last 30-45 minutes depending on how much soot is built up.
Good luck.

 

[Kiwibru]

One issue that no one has mentioned but is important is the fuel quality. US diesel fuel is very bad. Compared to EU diesel there is at least a 10-12 point lower cetane reading in US diesel. All the sulfur has been removed to make it meet air quality issues. That removes the lubricity in the diesel and reduces the cetane. If you run a diesel fuel additive in your off road fuel (dyed red) it will increase the fuel quality. I have used Opti-Lube XPD additive in my diesel engines for years, including the Yanmar from day one. I suspect that might be a reason for better performance and reduced regens. Could the fuel quality be related? Regens are happening so frequently for some. If the fuel cetane is increased and the lubricity is increased (which helps the IP with lubrication) by using a fuel additive, might that be the answer? I for one believe it is as it has certainly helped reduce my regens to one every 150 hours or so and now at 800+ hours.

 

[Kiwibru]

Just to follow up...high cetane will increased fuel burn which provide cleaner burn, and will reduce soot. Thus the DPF sensor will not detect soot as frequently due to lower build up. More time between regens.

 

[ericm979]

If you can find it, renewable diesel is far higher cetane than bio or petroleum based diesel. Switching made my Branson with DPF run noticeably better. It starts easier, runs smoother and the exhaust smells less. In my 2022 Silverado HD there's no difference that I notice.

R80 (the 20% is mostly biodiesel) or R99 (1% petroleum diesel) have recently become common in California. They're becoming more common in the rest of the west coast. R99 has cetane of 70 or more. Some stations label it as renewable but many just say bio based or something similar that makes it sound like bio diesel. It starts with a similar organic oil but it's a different, better process.

This is a good tool to find stations with renewable diesel:

Alternative Fuels Data Center: Alternative Fueling Station Locator

 

[Jaybr]

My YT359c is at -35 hours and yet to do a regen. I use it a lot for mowing and running at around 2400rpm. Also been moving logs and brush at lower RPMs

 

[freightboy]

Fuel quality is definitely a factor. Yanmar has yet to approve the use of fuel additives or the renewable diesel, so use at your own risk. The best way to prevent unnecessary regens is to use the lowest biodiesel blend available (B7, 7% or less is most desirable), run the engine at higher rpm's and load the engine to create heat. Heat is key to burning accumulated soot between requested regenerations.

Another tip, make sure to choose the right engine oil. Yanmar requires CJ-4 or higher. This is a low ash oil designed for Tier IV diesel engines with a DPF. Using the wrong oil can add to the ash accumulation in the soot filter. Ash is the finest state of soot after it is burned and is the service life of the soot filter.

The Yanmar Academy YouTube page has a 3-part series on regeneration that can help to explain what to expect concerning regenerations.

 

[Jaybr]

Hit my first regen today at 49 hrs while mowing, I just kept mowing and let it do it's thing. Probably just a coincidence, but I also put 5 gallons of offroad diesel in it before I started mowing. This is the first time I've used the offroad diesel as I just found a local station with it.

 

[5030]

Most likely coincicence as ORD is the same as On Road except for the red dye. It's all Ultra Low Sulfer Diesel.

 

[walnutman]

One gen in 150 hrs

 

[5030]

Nice thing about my Kubota's, NO REGENS EVER... 6,000 and 5500 hours respectively. Only regens are the Li-Ion batteries in the Mag lite that mounts in the cab...lol